Coach Me! - I'm Being Trained By My Senior Idol! - summary:

When fierce-looking guy gets some se** training, their talent as an idol bloom...!? Shun Sahohime has been rejected in auditions many times for his vicious smile. One day, a man reaches out to Shun for his potential and the man is no other than the guy he looks up to, famous idol Kaishi Sakuragasane...!?+